Upper critical field of the noncentrosymmetric superconductor BiPd

Darren Peets, Ana Isabel Maldonado Cid, Mostafa Enayat, Zhixiang Sun, Peter Wahl, Andreas Schnyder

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The superconducting parameters and upper critical field of the noncentrosymmetric superconductor BiPd have proven contentious. This material is of particular interest because it is a singular example of a 4 f-electron-free noncentrosymmetric superconductor of which crystals may be grown and cleaved, enabling surface-sensitive spectroscopies. Here, using bulk probes augmented by tunnelling data on defects, we establish that the lower of the previously reported upper critical fields corresponds to the bulk transition. The material behaves as a nearly-weak-coupled BCS s-wave superconductor, and we report its superconducting parameters as drawn from the bulk upper critical field. Possible reasons behind the order-of-magnitude discrepancy in the reported upper critical fields are discussed.
Original languageEnglish
Article number174504
Number of pages6
JournalPhysical Review. B, Condensed matter and materials physics
Volume93
Issue number17
DOIs
Publication statusPublished - 10 May 2016

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